Korean J Urol.  1998 Jul;39(7):662-665.

The Effect of Urethral Catheter on Pressure-Flow Study

• Kim KB
• Chung IY
• Kim DY

Abstract

PURPOSE: The effect of a urethral catheter on pressure-flow study has important implications for the practice and interpretation of pressure flow studies. We wonder which catheter would be adequate for pressure flow study. We report 3 different size of catheters(4Fr, 10Fr, 12Fr) effects on urinary flow rate, voiding pressures and pressure flow plot. MATERIALS AND METHOD: Pressure flow studies were carried out on 141 patients(male;88, female;53), whose diseases were BPH in 22, prostatodynia in 37,urethral syndrome in 36, Hinman syndrome in 2, neurogenic bladder in 28, unstable bladder in 10, urethral stricture in 2 and bladder stone in 2.
RESULTS
There was no significant difference between pre- and postcatheterization maximum flow rate in 4Fr group. But there were significant difference between pre- and post-catheterization maximum flow rate in 10Fr and 12Fr group. The detrusor pressure was significantly higher in 10Fr and 12Fr group than in 4Fr group. The larger size of catheter groups had more obstructive patterns in pressure flow plot.
CONCLUSIONS
These results showed 4Fr catheter had less effect on pressure flow study than 10Fr, 12Fr catheter.

Keyword

Urethral catheter; Pressure flow study

MeSH Terms

Catheters
Urethral Stricture
Urinary Bladder
Urinary Bladder Calculi
Urinary Bladder, Neurogenic
Urinary Catheters*